Pulley and block therefor.



H. E. WILLIAMSON.

PULLEY AND BLOCK THEREFOR.

APPLICATION FILED NOV,19,1913.

Patented Sept. 22, 19141 IN VENTOR, Herbert E. lfillmm'son A TTORNE YTHE NORRIS PE'IERS CO PHOYD-LITNQ, wAsHINGmN. n. c

HERBERT wrLLIai/ison, or sex rnanorsco, CALIFORNIA.

PULLEY AND BLOCK THEREFOR.

Specification. of Letters Patent. Application filed November 19, 1913.Serial No. 801,847.

To all whom it may concern,

Be it known that I, HERBERT E. WILLIAM- son, a citizen of the UnitedStates, residing at San Francisco, in the county of San Francisco andState of California, have invented new and'useful Improvements. inPulleys and Blocks Therefor, of which the following is a specification.

The object of the present inventionis to provide a pulley block andpulley especially" adapted for supporting a traveling rope, such as aclothes line, upon which are secured hangers for suspending clothes orother objects, and to greatly reduce the cost of construction of suchpulley and block.

In the accompanying drawing, Figure 1 is a side view of the pulley blockand pulley therein; Fig. 2 is an axial vertical section thereof; Fig. 3is a bottom plan view thereof; Fig. 4 is an enlarged sectional view onthe line 4 -4i of Fig. 2.

Referring to the drawing, 1, 2 indicate the two parts of my improvedpulley block, connected by a central shaft 3, having a head 4: abuttingagainst the outer surface of the part 1, a cotter pin 6, through a holein the other end of the shaft 8, abutting against the outer surface ofthe other part 2. The part 1 of the pulley block is provided at the topwith a portion 7 extending inwardly and then upwardly and apertured, asshown at 8, for suspending the pulley block from any suitable support,and the part 2 of the pulley block is formed, also at the top, with alip 9 extending inwardly beneath the inwardly and upwardly extendingportion 7, and spaced therefrom a sufficient distance to permit anupwardly and outwardly extending hanger carried by a rope on the pulleyto pass between said lip, and extension. The lower portion of the part 1of the pulley block has an inward extension 11, of which the innermostpart 12 extends slightly downward and is of reduced thickness to form awall 13, and is apertured centrally as shown at 1 1. The other part 2 ofthe pulley block has at its lower portion an inward extension 16 adaptedto rest upon the reduced portion 12 of the extension 11, so that thefree edge of said extension 16 abuts against said wall 13, the extension16 terminating centrally in a hook 17 which can enter said aperture 14;.Said wall 13 has convex projections 18,. and the edge of the extension16 has concave recesses to recelve said projections, to prevent relativecircumferential movement of these extensions 11, 16,. from the two sidesof the pulley block, said parts ar e secured together at their lowerportions, and

by means of the shaft 3 and the cotter pin 6 they are secured togetherat their center.

()n the shaft 3 rotates a pulley 21 which is made in two sections, theplane of divi sion of the sections being centrally therebetween and atright angles to the shaft 3. One of said sections has no spokes and theother is formed with a. hub 22 and four spokes 23, and from each of twoof said spokes there extends in a general tangential direction, butinclined toward the other section, a lug 24. From the inner side of therim of said other section there extend two diametrically oppositefingers 26, each finger being inclined to the radius therethrough andalso to the other section. When joining the two sections they are firstplaced together so that each finger enters a quad rantal space towardwhich a lug 21 of the other section projects, and then the two sectionsare turned about their axes while maintaining them in contact, so thatthe outer side of each finger is moved into engagement with the innerside of one of the lugs, in which posit-ion the two sections are heldagainst movement from one another in an axial direction. While the partsare held in this position the pulley is galvanized, in which operationthe zinc used for galvanizing enters the interstice between the twoadjacent faces of the two sections, and, when the galvanization iscomplete, it is found that the two sections are united together by theZinc between them. The advantage of this construction of pulley is thatthe two separate sections are easier to cast than the whole pulley in asingle piece and thus the construction is cheapened.

I claim 1. A pulley block having separable parts of which one has aninward and upward extension terminating in an upwardly extendingapertured portion, and the'other has an inwardly extending lip, the edgeof which is adjacent to, but spaced from, said extension.

2. A pulley block having separable parts of which one has an inwardextension terminating in upwardly extending means for suspending thepulley block, and the other Patented Sept. 22, 1914.

of said parts; By means has an inwardly extending lip, the inner edge ofwhich is adjacent to, but spaced I from, said extension.

3. .A pulley block comprising two separable parts and a shaft connectingthem at their centers, said parts having inward extensionshavingvintegral parts of which one is apertured' and the other has anintegral -.radially extending hook removably extend-V 0f which onehas aninward extension terminatlng 1n upwardly extending means for suspendingthe pulley block, and the other copies of this patent may be obtainedfor five cents each by addressing the Commissioner of Eatents,

i,1ii,118

edge of which is adjacent to, but spaced ing them at their centers, saidparts having inward extensions having integral parts engaging each otherand preventing relative rotary movement in either: diree-" tion of thetwovparts of the block.

I .In testimony whereof Ihave hereunto set my hand in the presence oftwo subscribing witnesses.

from, said extension; and ashaft connect- HERBERT WILLIAMSON.

Witnesses FRANCES M. WBIGHT, D. B. RICHARDS.

Washington, D. G.

